Fuel-feeding system for internal-combustion engines



FUEL FEEDING SYSTEM FOR INTERNAL COMBUSTION ENGINES Filed June 5, 1924 2 Sheets-Sheet l a E f J6- J5 4-5 M Q a June 14 1927. v

A. G. REDMOND FUEL FEEDING SYSTEM FOR INTERNAL comsusuon mamas Fil n 3. 1924 2 Sheets-Sheet 2 HillHljli u appended claims.

Patented June 14, 192-7.

UNITED STATES ALBERT G. REDMOND, OF

INDIANAPOLIS, INDIANA, ASSIGNOR T JACOB RICHARD FRANCIS, OF FLINT, MICHIGAN.

FUEL-FEEDING SYSTEM FOR INTERNAL-COMBUSTION ENGINES.

Application filed June 3,

This invention relates to a fuel feeding system for internal combustion engines and more particularly to a fuel feeding system used in connection with motor vehicles, the object being to provide a system by means of whichfuel can be supplied to the carburetor at any desired pressure without varying to any extent under all conditions.

Another object of my invention is to provide a fuel feeding system which is automatic in operation at all times, the construction being such that the current used for operating the same is automatically cut off it the switch is accidentally left on.

A further object of the invention is to provide a fuel feeding system which will supply an excessive amount of fuel under all loads thereby overcoming the ditliculties now existing with a system of the vacuum tank type now in general use.

A still further object of the invention is to provide a fuel feeding system which is exceedingly simpleand cheap in construction and one which can be attached to any of the various types of automobiles now in general use without interfering with any of the mechanism of the motor vehicle.

Another and further object of the invention is to provide a fuel feeding system in the form of an electrical pump which is self-priming and self-lubricating and one which will operate on a partially charged battery and when the car is in any position.

Other and further object-s-and'advantages of the invention-will be hereinafter set forth and the novel features thereof defined in the In the drawings: Figure 1 is a side elevation of the front portion of an automobile showing the appli-,

cation of my improved construction of fuel feeding system; I

Figure 2 is a vertical section through the pump;

Figure 3 is a section taken on line v of Figure 2;

Figure 4. is a section taken on line 44 of Figure 2: p

Figure 5 is a detail top plan view of a portion of the float levers; and Figure 6 is a detail enlarged vertical section through the float chamber.

In the drawing 1 indicates an internal combustion engine and 2 a portion of the dash'of the motor vehicle. The internal 1924. Serial No. 717,595.

combustion engine is provided with the usual charge forming device 3 and the motor vehicle is provided with a fuel tank 1 herein shown arranged in a plane below the internal combustion engine and is preferably arranged on the rear of the motor vehicle. 5 is the electric battery now enerally in use in connection with automobiles for starting and lighting.

In the embodiment of my invention as herein shown I employ a pump cylinder 6 surrounded at its upper end by a solenoid 7 enclosed in a casing 8 which is provided with a bracket 9 for attaching the same to the motor vehicle and as herein shown the same is attached to the dash 2 under the hood, but, it is, of course, understood that the same can be arranged at any desired point and therefore I do not wish to limit myself to the positioning of the same so long it is arranged in a plane above the carbu'reter or charge forming device Secured over the upper end of a pump cylinder 6 is a fuel reservoir 10 having an open upper end which is closed by a cover plate 11 which is clamped on the annular flange of the reservoir by screws 12, a gasket being arranged on the annular flange to form a tight joint so that the fuel pumped into the reservoir 10 will be prevented from leaking out through the top.

The cover plate 11 is provided with a vent 14 and the reservoir is provided with an outlet nipple 15 to which is connected at delivery pipe 16 extending to the bowl of the charge forming device 3 as clearly shown in Figure 1, whereby fuel pumped into the reservoir .10 will be supplied to the charge forming device by gravity.

The cover plate 11 is provided with a cen tral opening 17 in which is secured a thimble 18 of an electric magnet 19 for the purpose hereinafter fully described. Secured on the.

cover plate ll around the electric magnet 19 is a supporting ring 20 carrying a pair of oppositely disposed binding posts 21 and 22 which are insulated from the ground, the post 21 being connected by a lead wire 23 to the battery 5 which is also groundedv as.

shown. These posts are in electric circuit with a solenoid '7 through lead wires 24 and the posts are connected together by a bridge plate 25 having a contact point 26 adapted to. be engaged by a pivoted contact 27 mounted in. a bracket 28 the pivoted contact bein normally held in contact with the contact 26 by a sprin 30, carried by the binding post 22, the %ridge plate 25 being insulated from the post 21 by fibrous washers as clearly shown and the pivoted contact 27 is grounded as shown at 31. A suitable switch 32 is disposed in the electric circuit so that the current can be cut off from the device when desired.

Slidably mounted within the pump cylinder 6 is a hollow piston 33 provided with a plug 34 at its lower end provided with passages and having a valve seat for check ve 35. The upper end of the hollow piston is closed by an apertured plug 36. Slidably mounted within the hollow piston through the plug 36 is a piston rod 37 proa check valve 42, said valve casing being en-' larged to form a strainer chamber 43 in which are arranged superposed cup-shaped strainers 44 secured in positlon by a cover 45, said cover being provided with a threaded nipple 46, to which is adapted to 'be connected a supply pipe 47 extending from the low level fuel reservoir 4 and when the piston is operated, fuel from the low level reservoir will be drawn up through the hollow piston into the reservoir 10.

Secured to the underside of the cover plate 11 is a substantially U-shaped bracket 48 provided with a central bearing 49 in which is slidably mounted the reduced stem 50 of a core 51 adapted to work in the thimble 18 of the electric magnet 19 so when the core 51 is in raised position as shown in Figure 6, the pivoted contact 27 will be held out of engagement with the contact 26. The stem 50 is enlarged at its lower end as shown at 52 in which is secured the piston rod 37, said enlargement being provided with an annular seat to receive a fibrous cushioning member 53.

Pivotally mounted in the U-shaped bracket are a pair of float arms 54 having turned down apertured ends as clearly shown,

which are adapted to receive lugs 55 carried by a cylindrical float 56 mounted within the float chamber 10 as clearly shown in Figures 2 and 6.

The inner ends of the float arms 54 are so formedthat when the float is in its lower position, the core 51 Works freely between the same but when the float is raised by an accumulation of fuel within the float chamber 10 so that the arms instead of being in,

sition as shown in Figures 2 and 6, the shoulof the shoulder formed by the core 51 andthe piston drops drawing the core out of the electric magnet 19 so that the spring 30 forces the pivoted contact into engagement with the fixed contact so as to energize thesolenoid to cause the piston to move upwardly.

While I have shown certain details of constructiom'l do not wish to limit myself to these details as I am aware that various changes can be made without departing from the spirit of my invention.

The operation of the fuel feeding system as herein shown is as follows: Assuming that the system has been applied to a new car with the bowl of the carbureter or charge forming device empty, the switch 32 is operated so as to throw the solenoid of the pump intoelectric circuit with the source of energy which is the battery 5. The solenoid being energized, the piston is drawn upwardly and as the piston moves upwardly, the piston rod is carried upwardly so as to move the core 51 upwardly into the electric. magnet.

When the core of the electric magnet is in the thimble of the magnet, the pivoted contact 27 is drawn away from the fixed contact so as ,to break the electric circuit and the piston drops by gravity. Fuel-which has been drawn into the pump cylinder 6 on the upstroke of the piston passes up through the hollow piston into the reservoir 10 and this operation is repeated until the level of the fuel in the bowl rises beyond a predetermined level which causes the float to move upwardly into such a osition that the arms move into the path 0 travel of the core 51 and hold the core in the electric magnet so that the circuit is broken and the pump ceases to operate. \Vhen the motor 'of the automobile is started and fuel is being consumed by the charge forming device, the level in the reservoir 10 drops so to allow the float to drop and move the arms out of the path of the core, so that the piston drops into the cylinder and the circuit is again completed so as toraise the piston and this is repeated until the fuel again rises in the fuel reservoir 10 beyond the predetermined height.

This provides means for keeping an auxiliary supply of fuel in the reservoir 10 so as to feed it by gravity to the charge forming device. 0 long as the fuel is being consumed as fast as it is being supplied, the

lit

extreme speed or load, thereby overcoming the difficulties now existing with fuel feeding systems now in general use. As the piston raised, the spring is compressed so that when the electric circuit is broken by the pivoted contact being drawn away from Y the fixed contact by the electric magnet, the spring has a tendency to force the piston downwardly and as the weight of the piston aids the downward movement of the same, the fuel which has been drawn into the pump cylinder is forced up through the hollow piston into the reservoir.

From the foregoing description it will be vseen that I have provided a fuel feeding syslcrn for internal combustion engines especially adapted to be used in connection with motor vehicles in which an electrically operated pump is employed having an electric magnet switch which is automatic in operation so that fuel is supplied. constantly to the charge forming device, the construci'ion of the pump being such that when the supply is greater than the consumption, the pump ceases to operate automatically and starts to operate when the fuel in the reservoir drops below a predetermined level.

What I claim is':' 1. A fuel feeding system for motor velncles comprising a pump, said pump compris- ,mg a pump cylinder and a piston movable therein, an elcctrlc circuit including a source of current, a solenoid for actuating said piston, a circuit maker and breaker in said electric circuit controlling the electrical energy to said solenoid, an electric magnet operating said circuit maker and breaker. in said electric circuit and a connection between the piston of said pump and the core of said electric magnet.

2. A fuel feeding system for motor vehicles comprising a pump, said pump com-,- prising a pump chamber and a piston movab'e therein, an electric circuit including 'a source of current, a solenoid for actuating said piston arranged in said electric circuit,

a circuit umker and breaker for controlling the source of current to said solenoid, an electric magnet including a movable core arranged in said circuit for actuating said circuit maker and breaker and a connection between said piston and said core for interhiill'ciil'ly making and breaking said circuit.

A. fuel feeding system for motor vehicles comprising a pumpgsaid pump comprising apump cylinder and a piston movable therein, an electric solenoid for actuating said piston arranged within said electric circuit, an electric magnet sw tch controlling the elcctrical energy to said solenoid and means actuated by said piston for controlling said electric magnet for intermittently making and breaking "said circuit.

4. A fuel feeding system for motor. ve-

hicles comprising a pump having a recipro-' eating piston, an electric circuit including a source of energy, a solenoid for actuating said piston arranged in said circuit, an electric magnet including a coil anda movable core arranged in said electric circuit, a circuit maker and breaker actuated by said magnet, and a connection between said pisand a connection between said. piston and said movable core.

6. A fuel feeding system for motor veh1- cles comprismg a pumpfsaid pump "com- '80 ton and said core for allowing saidelectric prising a pump cylinder and a movable pis- 4 ton, an electric magnet comprising a coil and a movable core, a circuit maker and breaker in said electric circuit for controlling the supply of electrical energy to said electric magnet, a float in said supplen'iental tank having means for holding said movable core within the coil of said electric magnet when the fuel in said supplemental tank rises beyond a predetermined level.

7. A fuel feeding system for motor ve-' lncles comprising a pump having a piston,

an electric circuit including a source of current, a solenoid arranged in said electric circuit for operating said piston, a circuit maker and breaker for controlling the supply of electrical energy to said solenoid, a'n.

electric magnet-operated circuit maker and breaker controlled by said piston in said float for controlling said circuit maker and lneaker. 1 i

8. A fuel feeding system for internal combustion engines comprisii'ig a pump, said pump comprising a pump cylinder and a piston movable therein, a solenoid for raising said piston in said cylinder. an electric circuit including a source of current" in which said solenoid is connected, a circuit maker and breaker, an electric magnet for actuating said circuit maker and breaker arranged in said electric circuit, saidelectric magnet including a coil and a movable lLZO core and a connection between said piston and said core for causing said core to be moved out of said 0011 on the stroke of said er to close rent in which said solenoid is connected, a

circuit maker and breaker for controlling the supply of current to said solen0id,-an elect'ric magnet arranged in said electriccircuit, said electric magnet comprising a coil and a core movably mounted therein and a sliding connection between said core and said piston for moving said core out of said coilwhen the piston of said pump reaches the end of its down stroke in said cylinder.

10. A fuel feeding system for internal combustion engines comprising a cylinder having a piston, a circuit maker and breaker comprising a fixed contact and a movable contact adapted to be held into engagement therewith b'y resilient means, an electric magnet for moving said contact out of engagement with the fixed contact, said electric magnet including a coil and a moyable core, a solenoid for raising the piston in said cylinder, an electric circuit including a source of current in which said solenoid and electric magnet is connected, a connection between said core and said piston for moving said core out of said coil on the "down stroke of said piston. to release said movable contact and a float mounted in said auxiliary reservoir adapted -to hold said core in said coil when the fuel in said auxiliary reservoir rises beyond a, predetermined level.

11. A fuel feeding system for motor vehicles comprising an electric pump, an electric circuit including a source of current for said pump, an electric magnet arranged in said electric circuit, a circuit maker and breaker actuated by said electric magnet and means actuated by said piston for controlling said electric magnet for intermittently making and breaking said circuit.

12.. A fuel feeding systemfor motor vehicles comprising an electric pump,-an electric circuit including a source of current for said pump, an electric magnet arranged in said electric circuit,.a circuit maker and breaker actuated by said electric magnet and a float arranged in said auxiliary reservoir for controlling said electric magnet to cut olf the supply of electrical current to said pump when the fuel in said auxiliary reservoir rises beyond a predetermined level.

13. A fuel feeding system for internal combustion engines comprising an electric circuit including a source of electric current, an electric pump for lifting fuel from said main tank to said auxiliary tank, an electric magnet switch arranged in said electric circuit and controlled by the movement of said piston for intermittently energizing and de-energizing said electrical pump.

14. A fuel feeding system for internal combustion engines comprising an electric pump, an electric circuit including a source,

combustion engines comprising an electrical pump, an electric circuit including a source of current in which said pump is connected, an electric magnet "includinga coil and a movable core arranged in said electric circuit, a circuit maker and breaker having a fixed contact and a movable contact, said movable contact being normally held in engagement with the fixed contact and adapted to be moved away therefrom by said electric magnet, a connection between said core and 'the piston of said electrical pump for moving said core into and out of said coil and a float mounted. in said auxiliary tank having means for engaging said core for holding-- said core out of said coil when the fuel in said auxiliary tank rises beyond a predeter-. mined level.

16. A fuel feeding system for motor vehicles comprising a pumpgsaid pump comprising a'pump cylinder and a movable piston in the form of a core surrounded by a solenoid, an electric magnet comprising a coil and a movable core, a circuit maker and breaker in said electric circuit for controlling the supply of electrical energy to said solenoid and a connection between said piston and said movable core.

17. A. fuel feeding system for motor vehicles comprising a pump, said pump com prising a pump cylinder. and a movable piston in the form of a core surrounded by a solenoid, an electric circuit in wliiclisaid solenoid is arranged, an electric magnet comprising acoil and a movable core. a circuit maker and breaker in said electric circuit for controlling the supply of electrical energy to said solenoid and means operated by said piston for utilizing the magnetic force for breaking said circuit.

18. An electrically operated pump for fuel feeding systems for motor vehicles comprising a pump cylinder having a piston ,movably mounted therein surrounded by a solenoid. an electric circuit lnWhlCh said. solenoid is arranged, an electric magnet circuit maker and breaker arranged in said cirteam's; 5

cuit and means operated. by said piston for ranged, an electric magnet circuit meker utilizing the electric magnet force produced. and breakerarranged in said' electric cir- 10 in said electric magnet circuitinaker and wit and means for utilizing the magnetic breaker for breaking the electric circuit. '1 force of said electric magnet circuit maker 19. An electric pump for fuel feeding sys-- and breaker for breaking said circuit. .temsfor motor vehicles having a solenoid In testimony whereof I hereunto aflix in? for operating the iston of the pump, an signature.

electric-circuit in w ich said'solenoid is a r- ALBERT G. REDMOND. 

